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NPS Form 06a plo <br /> 169 <br /> (M) OMB Apvd No.7021-0O18 <br /> United States Department of the Interior <br /> National Park Service <br /> National Register of Historic Places <br /> Continuation Sheet <br /> Section number 7 Page 11 <br /> VI. Non-Contributing Buildings and Structures <br /> Non-contributing buildings, structures, sites, and objects, are those that <br /> have lost their architectural or structural integrity due to deterioration <br /> or extensive alteration after the historic period, and those constructed or <br /> placed outside the period of significance from 1859-1918. Mining, <br /> industrial, and other structures that are both deteriorated and <br /> geographically remote also are non-contributing to the NHL district. Mining <br /> and industrial objects, remains, and sites are not considered contributing <br /> if they have lost so much of their structural integrity that they can no <br /> longer sucessfully illustrate the mining and milling processes of which they <br /> were a part. <br />